– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Thu 24 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Thu 24 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 36mm), heaviest during Fri afternoon. Very mild (max 16°C on Thu morning, min 7°C on Fri night). Wind will be generally light. | Days 4–6 Weather SummaryHeavy rain (total 38mm), heaviest during Tue afternoon. Very mild (max 14°C on Sun afternoon, min 8°C on Sun night). Wind will be generally light. | |||||||||||||||||
Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  | |  |  |  |  |  | | | |  |  | |
cloudy | cloudy | mod. rain | mod. rain | mod. rain | heavy rain | rain shwrs | rain shwrs | cloudy | some clouds | clear | light rain | light rain | rain shwrs | mod. rain | mod. rain | heavy rain | rain shwrs | |
Cloud base (m) | 3050 | 750 | 550 | 600 | 600 | 650 | 1600 | 5600 | 5100 | 4950 | 1650 | 600 | 950 | 550 | 550 | 550 | 600 | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | 7 | 9 | 9 | 11 | 0.5 | 0.1 | — | — | — | 3 | 2 | 1.8 | 6 | 7 | 10 | 7 |
max °C | 16 | 16 | 13 | 12 | 11 | 8 | 8 | 12 | 9 | 12 | 14 | 9 | 9 | 11 | 10 | 9 | 10 | 9 |
min °C | 11 | 14 | 11 | 11 | 8 | 7 | 7 | 11 | 8 | 9 | 13 | 8 | 8 | 10 | 9 | 9 | 9 | 8 |
chill °C | 11 | 14 | 10 | 10 | 6 | 6 | 7 | 11 | 8 | 9 | 13 | 7 | 8 | 10 | 8 | 7 | 6 | 7 |
Freezing level m | 2800 | 2850 | 2600 | 2300 | 1750 | 1650 | 1600 | 2100 | 2300 | 2200 | 2200 | 2000 | 1850 | 2000 | 2100 | 2650 | 2400 | 1850 |
 | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — |
 | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:54 | — | — | 6:52 | — | — | 6:51 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 36mm), heaviest during Fri afternoon. Very mild (max 16°C on Thu morning, min 7°C on Fri night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Heavy rain (total 38mm), heaviest during Tue afternoon. Very mild (max 14°C on Sun afternoon, min 8°C on Sun night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.